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   67    

67 Ho Holmium

Lanthanoid, mass: 164.93 u, 1 stable isotope (165), abundance rank (earth/space): 57/76

Click image to magnify. Ultrapure holmium, 17 grams. Original size in cm: 1.5 x 2.5
Holmium Holmium piece
Holmium is, for a lanthanoid, quite resistant against oxidation and only slightly toxic. It is the element with the highest magnetic moment, therefore it has its main application within high-strength magnets. The color of its oxide is a very pure yellow, which is used to stain special glass.

Holmium(III) in acetic acid Holmium(III) crystals
Left: A small piece of holmium dissolved in 25% acetic acid. The reaction product contains the yellow holmium(III) ion, probably as holmium acetate.
Right: After the acid evaporated, small crystals of the holmium compound remained. Detail size about 4 cm. See also terbium.

Holmium dendrite Holmium oxidized
Left: Holmium dendrite, 2.5 cm long.
Right: After six month in air at room temperature, the holmium surface has oxidized only slightly.


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